Need to Stealth my window vent

[SubmarineGirl]

View attachment 295267

Sometimes this guy

 

[choxie]

The bedroom that my plants are in just releases it back into the room and my plants are at week7.5 of flower so when it open it's super strong. When it's closed I don't smell or notice anything. I do use a 6 inch ac infinity filter and a 6 inch exhaust fan on a tiny 1.5 x 3 x 5 foot tent.